If you are one of the Macintosh enthusiasts, Spiderweb has a nice holiday present for you - Avernum 4:

Avernum 4 is an enormous fantasy role-playing adventure. Wander a gigantic world, full of multitudes of characters, hundreds of side quests, and traps, tricks, and treasure in every corner. Experience the life of an adventurer: the fame, the wealth, the hapless townsfolk begging you for help at every turn! This epic tale is guaranteed to give you weeks of entertainment, with an impossibly huge world that dares you to uncover all of its secrets.